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<li class="navelem"><a class="el" href="dir_68267d1309a1af8e8297ef4c3efbcdba.html">src</a></li><li class="navelem"><a class="el" href="dir_2961cad218251a7c35c6867350b80887.html">common_util</a></li>  </ul>
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  <div class="headertitle"><div class="title">singleton.h</div></div>
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<a href="singleton_8h.html">Go to the documentation of this file.</a><div class="fragment"><div class="line"><a id="l00001" name="l00001"></a><span class="lineno">    1</span> </div>
<div class="line"><a id="l00019" name="l00019"></a><span class="lineno">   19</span><span class="preprocessor">#pragma once</span></div>
<div class="line"><a id="l00020" name="l00020"></a><span class="lineno">   20</span> </div>
<div class="line"><a id="l00021" name="l00021"></a><span class="lineno">   21</span><span class="preprocessor">#include &lt;mutex&gt;</span></div>
<div class="line"><a id="l00022" name="l00022"></a><span class="lineno">   22</span> </div>
<div class="line"><a id="l00027" name="l00027"></a><span class="lineno">   27</span><span class="preprocessor">#undef CUTL_COPY_AND_ASSIGN</span></div>
<div class="foldopen" id="foldopen00028" data-start="" data-end="">
<div class="line"><a id="l00028" name="l00028"></a><span class="lineno"><a class="line" href="singleton_8h.html#a8f0365b2a51b6cd09037b83c5df250d7">   28</a></span><span class="preprocessor">#define CUTL_COPY_AND_ASSIGN(classname)    \</span></div>
<div class="line"><a id="l00029" name="l00029"></a><span class="lineno">   29</span><span class="preprocessor">    classname(const classname &amp;) = delete; \</span></div>
<div class="line"><a id="l00030" name="l00030"></a><span class="lineno">   30</span><span class="preprocessor">    classname &amp;operator=(const classname &amp;) = delete;</span></div>
</div>
<div class="line"><a id="l00031" name="l00031"></a><span class="lineno">   31</span> </div>
<div class="line"><a id="l00037" name="l00037"></a><span class="lineno">   37</span><span class="preprocessor">#undef CUTL_SINGLETON_PTR</span></div>
<div class="foldopen" id="foldopen00038" data-start="" data-end="">
<div class="line"><a id="l00038" name="l00038"></a><span class="lineno"><a class="line" href="singleton_8h.html#a955faef8343c1603d8acb2b46572e7c9">   38</a></span><span class="preprocessor">#define CUTL_SINGLETON_PTR(classname)                                                             \</span></div>
<div class="line"><a id="l00039" name="l00039"></a><span class="lineno">   39</span><span class="preprocessor">public:                                                                                           \</span></div>
<div class="line"><a id="l00040" name="l00040"></a><span class="lineno">   40</span><span class="preprocessor">    static classname* get_instance()                                                              \</span></div>
<div class="line"><a id="l00041" name="l00041"></a><span class="lineno">   41</span><span class="preprocessor">    {                                                                                             \</span></div>
<div class="line"><a id="l00042" name="l00042"></a><span class="lineno">   42</span><span class="preprocessor">        static classname* obj = nullptr;                                                          \</span></div>
<div class="line"><a id="l00043" name="l00043"></a><span class="lineno">   43</span><span class="preprocessor">        if (!obj)                                                                                 \</span></div>
<div class="line"><a id="l00044" name="l00044"></a><span class="lineno">   44</span><span class="preprocessor">        {                                                                                         \</span></div>
<div class="line"><a id="l00045" name="l00045"></a><span class="lineno">   45</span><span class="preprocessor">            static std::once_flag flag;                                                           \</span></div>
<div class="line"><a id="l00046" name="l00046"></a><span class="lineno">   46</span><span class="preprocessor">            std::call_once(flag, [&amp;] { obj = new (std::nothrow) classname(); });                  \</span></div>
<div class="line"><a id="l00047" name="l00047"></a><span class="lineno">   47</span><span class="preprocessor">        }                                                                                         \</span></div>
<div class="line"><a id="l00048" name="l00048"></a><span class="lineno">   48</span><span class="preprocessor">        return obj;                                                                               \</span></div>
<div class="line"><a id="l00049" name="l00049"></a><span class="lineno">   49</span><span class="preprocessor">    }                                                                                             \</span></div>
<div class="line"><a id="l00050" name="l00050"></a><span class="lineno">   50</span><span class="preprocessor">    ~classname();                                                                                 \</span></div>
<div class="line"><a id="l00051" name="l00051"></a><span class="lineno">   51</span><span class="preprocessor">                                                                                                  \</span></div>
<div class="line"><a id="l00052" name="l00052"></a><span class="lineno">   52</span><span class="preprocessor">private:                                                                                          \</span></div>
<div class="line"><a id="l00053" name="l00053"></a><span class="lineno">   53</span><span class="preprocessor">    classname();                                                                                  \</span></div>
<div class="line"><a id="l00054" name="l00054"></a><span class="lineno">   54</span><span class="preprocessor">    CUTL_COPY_AND_ASSIGN(classname)</span></div>
</div>
<div class="line"><a id="l00055" name="l00055"></a><span class="lineno">   55</span> </div>
<div class="line"><a id="l00060" name="l00060"></a><span class="lineno">   60</span><span class="preprocessor">#undef CUTL_SINGLETON_PTR_DEFAULT_CTOR</span></div>
<div class="foldopen" id="foldopen00061" data-start="" data-end="">
<div class="line"><a id="l00061" name="l00061"></a><span class="lineno"><a class="line" href="singleton_8h.html#a18256d54de956ff9be4d6887354737d5">   61</a></span><span class="preprocessor">#define CUTL_SINGLETON_PTR_DEFAULT_CTOR(classname)                                                \</span></div>
<div class="line"><a id="l00062" name="l00062"></a><span class="lineno">   62</span><span class="preprocessor">public:                                                                                           \</span></div>
<div class="line"><a id="l00063" name="l00063"></a><span class="lineno">   63</span><span class="preprocessor">    static classname* get_instance()                                                              \</span></div>
<div class="line"><a id="l00064" name="l00064"></a><span class="lineno">   64</span><span class="preprocessor">    {                                                                                             \</span></div>
<div class="line"><a id="l00065" name="l00065"></a><span class="lineno">   65</span><span class="preprocessor">        static classname* obj = nullptr;                                                          \</span></div>
<div class="line"><a id="l00066" name="l00066"></a><span class="lineno">   66</span><span class="preprocessor">        if (!obj)                                                                                 \</span></div>
<div class="line"><a id="l00067" name="l00067"></a><span class="lineno">   67</span><span class="preprocessor">        {                                                                                         \</span></div>
<div class="line"><a id="l00068" name="l00068"></a><span class="lineno">   68</span><span class="preprocessor">            static std::once_flag flag;                                                           \</span></div>
<div class="line"><a id="l00069" name="l00069"></a><span class="lineno">   69</span><span class="preprocessor">            std::call_once(flag, [&amp;] { obj = new (std::nothrow) classname(); });                  \</span></div>
<div class="line"><a id="l00070" name="l00070"></a><span class="lineno">   70</span><span class="preprocessor">        }                                                                                         \</span></div>
<div class="line"><a id="l00071" name="l00071"></a><span class="lineno">   71</span><span class="preprocessor">        return obj;                                                                               \</span></div>
<div class="line"><a id="l00072" name="l00072"></a><span class="lineno">   72</span><span class="preprocessor">    }                                                                                             \</span></div>
<div class="line"><a id="l00073" name="l00073"></a><span class="lineno">   73</span><span class="preprocessor">    ~classname();                                                                                 \</span></div>
<div class="line"><a id="l00074" name="l00074"></a><span class="lineno">   74</span><span class="preprocessor">                                                                                                  \</span></div>
<div class="line"><a id="l00075" name="l00075"></a><span class="lineno">   75</span><span class="preprocessor">private:                                                                                          \</span></div>
<div class="line"><a id="l00076" name="l00076"></a><span class="lineno">   76</span><span class="preprocessor">    classname() = default;                                                                        \</span></div>
<div class="line"><a id="l00077" name="l00077"></a><span class="lineno">   77</span><span class="preprocessor">    CUTL_COPY_AND_ASSIGN(classname)</span></div>
</div>
<div class="line"><a id="l00078" name="l00078"></a><span class="lineno">   78</span> </div>
<div class="line"><a id="l00083" name="l00083"></a><span class="lineno">   83</span><span class="preprocessor">#undef CUTL_SINGLETON_REF</span></div>
<div class="foldopen" id="foldopen00084" data-start="" data-end="">
<div class="line"><a id="l00084" name="l00084"></a><span class="lineno"><a class="line" href="singleton_8h.html#ae6202f16d5076942a5a57bd3feea2d1e">   84</a></span><span class="preprocessor">#define CUTL_SINGLETON_REF(classname)                                                             \</span></div>
<div class="line"><a id="l00085" name="l00085"></a><span class="lineno">   85</span><span class="preprocessor">public:                                                                                           \</span></div>
<div class="line"><a id="l00086" name="l00086"></a><span class="lineno">   86</span><span class="preprocessor">    static classname&amp; get_instance()                                                              \</span></div>
<div class="line"><a id="l00087" name="l00087"></a><span class="lineno">   87</span><span class="preprocessor">    {                                                                                             \</span></div>
<div class="line"><a id="l00088" name="l00088"></a><span class="lineno">   88</span><span class="preprocessor">        static classname obj;                                                                     \</span></div>
<div class="line"><a id="l00089" name="l00089"></a><span class="lineno">   89</span><span class="preprocessor">        return obj;                                                                               \</span></div>
<div class="line"><a id="l00090" name="l00090"></a><span class="lineno">   90</span><span class="preprocessor">    }                                                                                             \</span></div>
<div class="line"><a id="l00091" name="l00091"></a><span class="lineno">   91</span><span class="preprocessor">    ~classname();                                                                                 \</span></div>
<div class="line"><a id="l00092" name="l00092"></a><span class="lineno">   92</span><span class="preprocessor">                                                                                                  \</span></div>
<div class="line"><a id="l00093" name="l00093"></a><span class="lineno">   93</span><span class="preprocessor">private:                                                                                          \</span></div>
<div class="line"><a id="l00094" name="l00094"></a><span class="lineno">   94</span><span class="preprocessor">    classname();                                                                                  \</span></div>
<div class="line"><a id="l00095" name="l00095"></a><span class="lineno">   95</span><span class="preprocessor">    CUTL_COPY_AND_ASSIGN(classname)</span></div>
</div>
<div class="line"><a id="l00096" name="l00096"></a><span class="lineno">   96</span> </div>
<div class="line"><a id="l00101" name="l00101"></a><span class="lineno">  101</span><span class="preprocessor">#undef CUTL_SINGLETON_REF_DEFAULT_CTOR</span></div>
<div class="foldopen" id="foldopen00102" data-start="" data-end="">
<div class="line"><a id="l00102" name="l00102"></a><span class="lineno"><a class="line" href="singleton_8h.html#a4b31c1f99744b5d01441b61e30f4903c">  102</a></span><span class="preprocessor">#define CUTL_SINGLETON_REF_DEFAULT_CTOR(classname)                                                \</span></div>
<div class="line"><a id="l00103" name="l00103"></a><span class="lineno">  103</span><span class="preprocessor">public:                                                                                           \</span></div>
<div class="line"><a id="l00104" name="l00104"></a><span class="lineno">  104</span><span class="preprocessor">    static classname&amp; get_instance()                                                              \</span></div>
<div class="line"><a id="l00105" name="l00105"></a><span class="lineno">  105</span><span class="preprocessor">    {                                                                                             \</span></div>
<div class="line"><a id="l00106" name="l00106"></a><span class="lineno">  106</span><span class="preprocessor">        static classname obj;                                                                     \</span></div>
<div class="line"><a id="l00107" name="l00107"></a><span class="lineno">  107</span><span class="preprocessor">        return obj;                                                                               \</span></div>
<div class="line"><a id="l00108" name="l00108"></a><span class="lineno">  108</span><span class="preprocessor">    }                                                                                             \</span></div>
<div class="line"><a id="l00109" name="l00109"></a><span class="lineno">  109</span><span class="preprocessor">    ~classname();                                                                                 \</span></div>
<div class="line"><a id="l00110" name="l00110"></a><span class="lineno">  110</span><span class="preprocessor">                                                                                                  \</span></div>
<div class="line"><a id="l00111" name="l00111"></a><span class="lineno">  111</span><span class="preprocessor">private:                                                                                          \</span></div>
<div class="line"><a id="l00112" name="l00112"></a><span class="lineno">  112</span><span class="preprocessor">    classname() = default;                                                                        \</span></div>
<div class="line"><a id="l00113" name="l00113"></a><span class="lineno">  113</span><span class="preprocessor">    CUTL_COPY_AND_ASSIGN(classname)</span></div>
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